8160699: java.lang.VerifyError: Inconsistent stackmap frames at branch target
Summary: Ensure out of scope locals are not treated as being alive
Reviewed-by: mcimadamore
--- a/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Gen.java Tue Sep 13 19:32:03 2016 +0530
+++ b/langtools/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Gen.java Wed Sep 14 20:00:20 2016 +0530
@@ -1232,7 +1232,7 @@
Chain exit = switchEnv.info.exit;
if (exit != null) {
code.resolve(exit);
- exit.state.defined.excludeFrom(code.nextreg);
+ exit.state.defined.excludeFrom(limit);
}
// If we have not set the default offset, we do so now.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/test/tools/javac/SwitchExitStateTest.java Wed Sep 14 20:00:20 2016 +0530
@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8160699
+ * @summary Verify that having finished executing a switch statement live locals are exactly the same as it was upon entry of the switch.
+ * @run main SwitchExitStateTest
+ */
+
+public class SwitchExitStateTest {
+ public static void main(String[] args) throws Exception {
+ switch (0) {
+ case 0:
+ String a = "";
+ break;
+ default:
+ throw new Exception("Unknown ");
+ }
+
+ switch (0) {
+ case 0:
+ String b = "";
+ break;
+ default:
+ throw new Exception("Unknown ");
+ }
+ }
+}
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